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arXiv 2005.10549cs.IRcs.LG
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CATN:面向冷启动用户的Aspect传输网络跨域推荐

CATN: Cross-Domain Recommendation for Cold-Start Users via Aspect Transfer Network

Wuhan University(武汉大学);Alibaba Group(阿里巴巴集团);Nanyang Technological University(南洋理工大学)

Cheng Zhao, Chenliang Li, Rong Xiao, Hongbo Deng, Aixin Sun

摘要:

在一个大型的推荐系统中,产品(或项目)可以在许多不同的类别或领域。给定两个相关域(例如,书籍和电影),用户可以与一个域中的项目进行交互,但不能与另一个域中的项目进行交互。对于后者,这些用户被认为是冷启动用户。如何有效地将基于用户交互的偏好从一个域转移到另一个相关域,是跨域推荐的关键问题。受基于评论的推荐技术的启发,我们提出了一种基于评论的方面级用户偏好迁移模型。为此,我们提出了一个跨域推荐框架,通过方面传输网络的冷启动用户(命名为CATN)。CATN被设计为从他们的评论文档中提取每个用户和每个项目的多个方面,并使用注意力机制学习跨域的方面相关性。此外,我们进一步利用志同道合的用户的辅助评论,以提高用户的方面表示。然后,利用端到端的优化框架,以加强我们的模型的鲁棒性。在真实世界的数据集上,建议的CATN在评级预测精度方面明显优于SOTA模型。进一步的分析表明,我们的模型是能够揭示用户方面的连接,在一个精细的粒度级别的域,使建议可解释。

英文摘要:

In a large recommender system, the products (or items) could be in many different categories or domains. Given two relevant domains (e.g., Book and Movie), users may have interactions with items in one domain but not in the other domain. To the latter, these users are considered as cold-start users. How to effectively transfer users' preferences based on their interactions from one domain to the other relevant domain, is the key issue in cross-domain recommendation. Inspired by the advances made in review-based recommendation, we propose to model user preference transfer at aspect-level derived from reviews. To this end, we propose a cross-domain recommendation framework via aspect transfer network for cold-start users (named CATN). CATN is devised to extract multiple aspects for each user and each item from their review documents, and learn aspect correlations across domains with an attention mechanism. In addition, we further exploit auxiliary reviews from like-minded users to enhance a user's aspect representations. Then, an end-to-end optimization framework is utilized to strengthen the robustness of our model. On real-world datasets, the proposed CATN outperforms SOTA models significantly in terms of rating prediction accuracy. Further analysis shows that our model is able to reveal user aspect connections across domains at a fine level of granularity, making the recommendation explainable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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